Saw setting device for edgers



Feb. 13, 1940.

J. HEAPS ET AL SAW SETTING DEVICE FOR EDGERS Filed March 29, 1938 2 Sheets-Sheet 2 ATTORNEY.

UNITED STATE Patented Feb. 13, 1940 s PATENT OFFICE SAW SETTING DEVIGE FOR EDGERS .Application March 29, 1938, Serial No. 198,706

2, Claims.

Our invention relates to improvements in saw setting devices for edgers, the objects of which are to provide a plurality of hand wheels for adjusting the position of the saws upon the mandrel and for locking said saws in any adjusted position. A further object is to provide means for automatically locking the hand wheels against rotation.

The invention consists essentially of a setting device having axially aligned hand wheels, each of which is operatively connected. to a saw setting fork and means for locking the hand wheels against independent rotation, as will be more fully described in the following specification and shown in the accompanying drawings, in which:

Fig. 1 is a part plan view of an edger showing the invention.

Fig. 2 is a sectional view of the invention taken on the line 2-2 of Figure 1.

Fig. 3 is a front elevational view. i

Fig. 4 is a detail sectional view of the hand wheel locking means and is taken on the line 4-4 of Figure 1. i

In the drawings like characters of reference indicate corresponding parts in each figure.

The numeral I indicates generally the frame of an edger in which is journalled a saw mandrel 2 fitted with a plurality of sliding collars 3 nonrotatably connected to the mandrel, and a circular saw 4 secured to each of the collars. Mounted parallel to the mandrel 2 is a slide bar 5 upon which are slidably mounted brackets 6, each of'which support a saw setting fork 1. Each of said brackets is provided with horizontally projecting arms 8 through which the bracket is moved along the slide bar.

Extending across the front of the frame is a horizontal front member In which forms a sup;

port for a gear housing ll having front and rear walls respectively numbered I2 and 13. The front wall 12 of the gear housing carries a bearing I l in which is journalled three concentric sleeves l5, l6 and H, see Figure 4, all of which extend into thegear housing H. The sleeves are fitted respectively with a hand wheel 18A, IBB and 18C and pinions lElA, i913 and 19C. The hand wheels are each provided with a hollow boss 20 having at its rear end a conical clutch element 2i, which is adapted to coact with a complementary clutch element 22 of an adjacent boss or in the case of the wheel I8A with a complementary clutch element on the bearing 14. The outer wheel 18C is normally engaged by a cap 23 which is journalled in a standard bearing 24 and is slidably mounted therein. The cap 23 is freely mounted on the outer end of the sleeve l1 and is normally held in contact with the boss 20 of the hand wheel l8C by a bolt 25 passing through said cap, the sleeve I! and the rear wall 13 of the housing ll. The inner end of the bolt is 5 threaded as at 26 and is fitted'with an adjustin nut 21, with a compression spring 28 extending between the nut and the rear wall [3 to impart an endwise thrust between the cap 23 and the bearing I l to keep the sleeves l5, l6 and I! 10 from turning. The bolt 25 is fitted at its inner end with a fork 29, see Figure 2, which is connected through a bell crank 30 and a connecting rod 3! to a foot lever or pedal 32 which extends to a convenient position {adjacent the hand 15 wheels ISA, 1813 and H30.

Extending transversely through the gear housing II are racks 33A, 33B and 33C of rectangular cross section, which racks are suitably supported at opposite sides of the frame I and 20 a projecting arm 8 with its bracket 6 and saw setting fork l is attached. Extending across the front of the frame is the usual graduated gauge bar 36 and extending from each of the brackets 6 is a pointer 31.

In setting the machine for operation, the saws 35 4 are rotated to facilitate their endwise movement along the mandrel 2 and by depressing the foot lever 32 the thrust exerted by the spring 28 between thecap 23 in the bearing 24 and the bearing I4 is relieved, so that the hand wheels 40 ISA, I83 and I80 may be turned. The rotation of any of these wheels, say for instance 18B will impart rotation to the pinion I93 and will urge the rack 33B transversely of the edger and through the bracket 6 attached to the rack 33B, 4 and its setting fork I will move the corresponding saw longitudinally of the mandrel 2 to whatever position is desired, the position being read upon the graduated gauge bar 36. When all the saws have been set to position, the foot lever 32 is released, relieving the endwise pressure on the bolt 25, so that the spring 28 may impart endwise pressure between the cap 23 and the bearing l4 and lock the clutch elements 2! and 22 into intimate contact, thus preventing the hand wheels ISA, I81?- and 53C from being turned. The clamping screw 34 is turned by the hand lever 35 to lock the racks 33A, 33B and 1536 together, so that vibration during running may not allow any of the saws to move from their set position upon the mandrel.

What we claim as our invention is:

l. A device for spacing saws on a mandrel comprising a plurality of sliclable racks adapted to be mounted parallel to the mandrel, each of said racks having saw engaging means, a pinion for imparting endwise movement to each rack, a plurality of coaxially mounted hand wheels for rotating the pinions, said hand wheels having hubs, said hubs and said pinions being mounted on coaxial sleeves, a'bearing surrounding the sleeves, said hubs and bearing having complementary clutch members, means normally causing holding engagement between complementary clutch members and means for disengaging said clutch members for rotation of said hand wheels, said clutch engaging and disengaging means comprising a bolt extending through the sleeves, a cap carried by the bolt for engaging one of the hubs, a spring on the bolt for compressing the hubs between the cap and the bearing and manually operable means for thrusting the bolt against the spring.

2. A device for spacing saws on'a mandrel as claimed in claim 1, said manually operable means consisting of a bell crank bearing against the bolt to compress the spring and a foot pedal for rocking the bell crank.

JOHN HEAPS. JOHN MORTON HEAPS. 

